2012-07-30_REVISION - M2004030

• Permit No: M2004030
• IBM Index Class Name: REVISION
• Doc Date: 7/30/2012
• Doc Name: CONVERSION APPLICATION
• From: T BONE STONE QUARRY
• To: DRMS
• Type & Sequence: CN1
• Email Name: TAK
• Email Name: MAC
• Media Type: D
• Archive: No

Executive Summary of T -Bone Stone Quarry (110) Conversion to 112 Application
July 30, 2012
Page 4
installation of water or sewer lines will not be required.
During the course of quarry operations and after the operations are concluded the effect on flora and
fauna will be mitigated through best management practices which are detailed in the mining plan,
Exhibit D, and the reclamation plan, Exhibit E, and discussed below. There are no significant
historic or archeologic resources that will be impacted by the quarry operation. There are also no
identified critical wildlife habitats in or near the quarry site. There is no potential radiation hazard
on the site.
Reclamation Plan
The reclamation plan is detailed in the attached Exhibit E, which includes the Applicant's specific
responses to the Colorado State §110 Permit requirements, plus any new requirements associated
with the §112 permit. The proposed grading has been designed in a manner to minimize the impact
to the environment. Replacing overburden will be conducted on an ongoing basis, where practicable,
as part of normal quarry operations. Estimated depths will vary between 1 ft and 20 ft. The slope of
the proposed site currently ranges from 5% to 55% ( Non - Technical Soil Description, Exhibit C).
Gradient used for reclaimed slopes will be 3:1 were the original slopes support it. Gradients of
greater than 3:1 will be used only in areas where the original slopes are in excess of 3:1, never to
exceed the original slope maximum gradient of 55 %. The intent is to return the slopes to their
approximate original gradient, and leave rock benches where they may be necessary and appropriate
to promote slope stabilization and enhance safe passage for wildlife traveling through the reclaimed
quarry area in the future.
The first 12 inches of soil consists of very stony loamy fine sand (see Exhibit C). Because this
material is primarily rock and sand, it does not support significant vegetation. The intended future
use for the area is rangeland, which will be reestablished by revegetating with a mix of native grasses
in a manner and amount specified by Boulder County in the Revegetation and Native Grasses
Publications included in §110c Permit, Exhibit D, and by reestablishing native Ponderosa Pine @
ten trees per acre and Rocky Mountain Juniper shrubs @ five per acre.
Environmental Impacts
The current condition of the area of the property proposed for quarrying includes an historic quarry
that was abandoned more than fifty years ago. When the historic quarry was developed, many of the
reclamation and revegetation standards that now regulate §110 and §112 mining operations and are
now governed by the State of Colorado's Mined Land Reclamation statute did not exist. The demand
for Lyons Red Sandstone as a construction material throughout the Front Range and elsewhere in
the United States continues to exist. Modern mining and reclamation techniques will restore the site
effectively to a natural condition and eventually reclaim the site, including the unreclaimed quarry.
See T -Bone Stone Mining Plan Map.
The T -Bone Stone Site Plan illustrates how this will be accomplished. The proposed mining and
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